CarGurus and AutoTrader allow users to post listings of cars for sale, including used Volkswagen Jettas. Car sale listings on CarGurus are free, while AutoTrader charges an advertising fee.
CarGurus uses the car, mileage, transmission and ZIP code to calculate a price analysis for each user's car sale listing. The website analyzes the user's car data and generates suggestions for competitive pricing.
AutoTrader offers price packages for car listings, ranging from $29 to $99 as of March 2015. All plans offer a money-back guarantee if the vehicle does not sell by the end of the advertising period, which is 60 days.